The games in the game bags will target the second-grade Massachusetts State Standards and Mathematical Practices listed below, providing additional opportunities to practice and build skills and knowledge of these concepts. 2.OA.B.2 Fluently add and subtract within 20 using mental strategies. By the end of grade 2, know from memory all sums of two single-digit numbers and related differences. .2.OA.B.3 Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s. 2.NBT.B.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction 2.NBT.B.6 Add up to four two-digit numbers using strategies based on place value and properties of operations. 2.MD.A.1 Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes. 2MD.A.3 Estimate lengths using units of inches, feet, centimeters, and meters 2.G.1 Identify triangles, squares, rectangles, rhombuses, trapezoids, pentagons, hexagons, and cubes. Mathematical Practices: Make sense of problems and persevere in solving them. Use appropriate tools strategically Attend to precision Look for and make use of structure Look for and express regularity in repeated reasoning